Tape-cutting mechanism for book-backing machines.



J. HREN. TAPE CUTTING MECHANISM FOR BOOK BACKING MACHINES.

' APPLICATION FILED JUNE 9. 19H. 1,261,538.

Patented Apr. 2, 1918.

2 SHEETS-SHEET I.

44 45 I 4 I| I I I s Inventor;

MM X 'Atty.

HREN.

TAPE cunma MECHANISM FOR BOOK BACKING MACHINES. 1,261,538.

APPLICATION FILED JUNE 9. I91].

Patented Apr. 2, 1918.

2 SHEETS-SHEET 2.

V.) m n m A h m w 4% hu fl w cation,

JOSEPH HREN, OF KINGSTON, NEW YORK.

TAPE-CUTTING MECHANISM BOOK-BACKING MACHINES.

Specification of Letters Patent.

Original application filed September 11, 1914, Serial No. 861,158. Divided and this application filed June 9,

. 1917. Serial No. 173,865.

To all whom it may concern:

Be it known that I, J OSEPH HREN, a citizen of the United States, residing at Kingston, in the county of Ulster and State of New York, have invented an Improvement in Tape-Cutting Mechanisms for Book- Backing Machines, of which the following is a specification.

This invention relates generally to devices for automatically cutting into substantially uniform lengths, in trans't, a continuously advancing strip'or strips, and the present application. is adivision of my earlier applifiled September 11, 861,158.

The device of this invention is primarily designed to be an appurtenance to a book or pad backing machine, such as that shown and described. in the parent application aforesaid. In such a machine, properly assembled piles of superposed sheets are successively fed into the machine, which they are carried in processional order by suitable advancing mechanisms, a continuous strip of adhesive tape being fed into the machine and brought into proper contact with the edge of each pile of sheets to back the samein the usual manner, the tape being severed between the piles as the same are advanced and after application thereto. As this cutting operation should be automatic, and as it is ractically impossible to feed the assembled piles of sheets into the machine with invariable regularity, it will be apparent that the cutting mechanism should be operated or released for operation by each pile of sheets in turn as it reaches a certain point in its path of movement. Furthermore, the cutting operation must be ractically instantaneous, in view of the act that the tape must be severed without interru tion of advancing movement of the piles 0 sheets. Therefore, it has been found impracticable to provide cutting mechanism which is actuated by each of the advancing piles, in turn, and necessary to provide a cutter which is normally operative but which is checked under yielding forces by each advancing pile while the latter is in the path of movement of The principal object of the present invention is the provision of cutting mechanismof the character set forth which shall be entirely automatic, comparatively simple 1914:, Serial No..

through 'ferred manner of mounting the cutting 17 in mesh with the beveled not likely to get out of order, and efficient in operation.

My invention will be more readily understood by reference to the accompanying drawings, forming a part of this specification, in which a Figure 1 is a side elevation of a device embodying my invention;

A Fig. 2 is an end elevation thereof, partly in section;

Fig. 3 is an enlarged horizontal section, taken substantially on the line 3-3 of Fig. 2;

Fig. 1 is a vertical section, taken substantially on the line 4-4: of Fig. 3;

Fig. 5 is a vertical section, taken substantially on the line 5-5 of Fig. 3; I

Fig. 6 is a detail view, in side elevation, with parts in section, of the mechanism shownin section in Fig. 3, and

Fig. 7 is a detail view showing the preblade.

Referring now to the drawings in detail, numeral 11 may be assumed to designate the bed or table of a book backing machine, along which piles 12 of sheets or blanks are advanced and guided by nism, preferably such as shown" and described in detail in my co-pending appli-' Journaled in suitable bearings supported Patented Apr. 2, 1918.

any suitable mechaupon the main frame or table of the-machine and driven from any suitable source of. power-preferably as shown and described in said earlier application-is the 16 carrying the beveled gear gear'18 on the shaft 19 which is journaled 1n bearings at the upper ends of arms. 20 and 21 suitably mounted upon the frame of the machine. A sleeve 22 is revolubly mounted on the shaft 19, and at the end of this sleeve is vertical shaft mounted a circular hub or collar 23 which is provided with an end portion 24 of reduced diameter from which.reduced portion projects diametrically the lug 25. Adjacent substantially to the degree of curvature of the periphery of the hub 23 but which is, not in contact therewith or with the interior walls of the cup-shaped portion 27 of the sleeve 26.

In the annular channel formed between the walls of the cup 27 and the hub 23,.

is mounted the coil spring 30, in compression between the lugs25 and 28, and into this coil projects the curved rod 29. This spring is designed to be in some compression when in condition of maximuinwexpansion, with the lugs 25 and 28 in contact, as shown in Fig. 5, and obviously willbe further compressed when the parts 24 and 27 are so rotated with reference to each other as to separate said lugs.

Slidably secured in suitable openings near that end of the sleeve 26 which isopposite the cup-shaped portion thereof are the two 1 similar plugs 31 and 32, preferably in diametrical alinement with respect to the enlarged portion 19' of the shaft 19, the inner ends of which are in-curved to conform to the curvature of the shaft, and between said inner ends and the enlarged portion 19 of said shaft are the removable friction wearing surfaces 33 and 34, of leather or simi lar material. Mounted on the sleeve 26 over the plugs 31 and 32 is the collar 35, through threaded openings in which is passed the setscrews 36. and 37, so located that the interior ends of said screws impinge against the ends of the plugs 31 and 32 in the manner shown in Fig. 4. The purpose of the plugs 31 and '32 with the wearing surfaces 33 and 34 and the set screws 36 and 37, is to control the degree of frictional contact between the sleeve 26 and the shaft 19 by regulating the pressure of said wearing surfaces against said shaft. In this manner,

the pressure may be so regulated that when the shaft 19 is revolved, and the hub 23 checked against revolution therewith, the frictionalcontact will be sufficient to cause the sleeve 26 to revolve with-the shaft 19, thereby separating the lugs 25 and 28 and compressing the coil spring 30, until the free end of the arm 29 engages the 1ug25, thereby checking further rotation of said sleeve 26, the shaft 19 continuing to revolve against the wearing surfaces 33 and 34 vof the plugs 31 and 32. lit will now be seen thatnnder menses these conditions energy has been stored in the spring 30, subjecting the hub 23 to yieldmeans of screws 40 to a bracket 41, which is pivotally secured to the hub 23 by means of a pivot pin 42 passing through suitably apertured lugs on said hub and said bracket.

' A coil spring 43 serves to yieldin'gly retain said blades'rectangularly disposed with reference to the shaft 19, but capable of piv otal movement on the pin 42 away from the hub 23, to swing said blade to an inclined position, or even to a position substantially parallel to the shaft 19. It will therefore be seen that after the cutting operation,-

should the next succeeding pile of sheets engage the blade 38 before sufficient time has elapsed to permit withdrawal of said blade from the path of movement of said pile, said blade will merely be swung thereby to an inclined position, against the action of the spring 43, thus clearing the path of movement of said pile. I

Suitably carried by the frame of the machine is a rod 44, adjustably secured to -which is an arm'45 carrying a bracket 46,

and journaled in a suitable bearing carried by said bracket is a shaft 47 having mounted thereon, near one end thereof, a sprocket wheel 48.. The shaft 47 is driven in any suitable manner from a moving element of the machinepreferably as shown and described in my co-pending application aforesaid. A shaft 49 is secured at the lower end of the bracket 46 andhas revolubly mounted thereon a sprocket wheel 50 driven from the sprocket wheel 48 by means of the sprocket chain 51. A circular feed roller or disk 52 is also revolubly mounted on the fixed shaft 49 and is connected with the sprocket wheel 50 in such manner that both are caused to revolve upon revolution of the shaft 47.

A downwardly projecting bracket 53 is secured to the side of the frame of the machine, the center line of which is in approximately the same vertical plane as that of the axis of the disk or roller 52, and at its lower end said bracket carries a shaft 54 revolubly mounted in the sleeve 55 which forms a part of said bracket. A short arm 56 is secured at oneend of said shaft 54, said arm having a roller 57 mounted atthe free end thereof. At the other end of the shaft 54 is secured a vertical arm 58, which is held in. a desired position by means of a coil spring 59 interposed between the bracket 53 and the arm '58. A vertical arm or plate 60 is secured to one end of a substantially horizontal arm 61, the other end of which is pivotally mounted to the frame of the machine. At its lower end, the arm or plate 60 rests upon the roller 57 carried by the arm 56, and at the upper end of the arm 61 is mounted a roller 62, said roller projecting through a slot 63 in the main table 11 whereby a part'of the periphery of said roller normally projects above the upper surface of said table directly underneath the disk 52. Pivotal movement of the arm 58, due to oscillation of the shaft 54:, is limited by stops 64 and 65, said stops being so located that when the roller 62, the arm 60, the shaft 54 and the arm 58 are in what maybe termed theirnormal positions, the upper end of the arm 58 slightly clears a lug or stop 66 (Fig. 7) on the-hub 23, while when the roller 62 has been so depressed that the extreme upper point of its periphery is on substantially the I of a pile nor change the same level as the upper surface of the main table 11, thus slightly revolving the shaft 54 from its normal position by depression of the roller 57 by the arm or plate 60, the

upper end of the arm 58 will be in position to engage the lug or'stop 66 on the hub 23 and thus prevent, revolution of said hub around the shaft 19 in a direction to carry the blade 38 in the direction of the table 11, Thecoil spring 59 tends to retain the arm 58 in such position that the roller 62 will extend slightly above the upper surface of the main table 11, and to return said roller to said position when displaced therefrom.

It will now be apparent that the passage of superposed sheets 12 over the surface of the table 11 and underneath the disk 52, will result in depression of the roller 62 substantially to the level of the table; top, and will cause the arm 58 to be moved into a position such that its upper end will engage the lug or stop 66 on the hub 23 and thus prevent revolution of said hub, holding the blade 38 substantially in a vertical position, as shown in Fig. 2. However, as soon as the pile 12 of sheets has passed out of contact with the roller 62, the reaction of'the coil spring 59 will return the roller 62 to itsinitial or normal position, and in such manthe arm 58 to throw the same out of engagement with the lug or stop 66, thus. permitting the'reactionof the compressed coil spring 30 to rapidly revolve the hub 23 and therewith theblade 38, which crosses the path of movement of the tape 15 and passes through a suitable slot (not shown) in the edge of the table 11, thereby severing the tape close to the end of the edge of the pile 12 of sheets of blanks.

On completion of its partial revolution,

' clue to the reaction of the spring 30, the hub 23 continues to revolve, due to the continuous revolution of the shaft 19, and if by the upper position of the upper end of v time the blade 38 has returned to its substantially vertical initial or normal position another pile of sheets has not been interposed between the disk 52 and the roller 62, the hub with the blade mountedthereon will continue to revolve at practically the same speed as the shaft 19, and will again sever the tape, if the latter is still interposed in the path of movement of said blade. In the normal operation of the machine, however, the piles of sheets are so spaced apart as they are fed into the machine that by the time the blade 38'has returned to its initial or normal position, as aforesaid, the next succeeding pile of sheets will be in position to depress the roller 62, thus bringing the end of the arm 58.into position to engage the lug or stop 66 and hold the hub 23 stationary until the pile of sheets has cleared the roller 62, again releasing the hub 23 for a repetition of the severing operation.

Many modifications of minor details of my improved tape cutting mechanism for book backing machines and the like will doubtless readily suggest themselves to those skilled in the art to which it appertains, and

operative by the interposition of a pile of assembled sheets therein and in the path of movement of said blade for checking said blade againstrotation under action of its spring.

2. In a machine for advancing in continuous procession individual piles of assembled sheets having applied to an edge of each thereof a continuous strip of adhesive tape, mechanism for severing the tape between said piles which comprises a spring-actuated, rotatable cutting blade operable in one directio only, normally inoperative means for chec ing'said blade against rotation under action of its spring, and means for rendering said checklng means operative when a pile of sheets in transit is in the path of movement of said blade.

3. In a machine for advancing in continuous procession individual piles of assembled sheets having applied to an edge of each thereof a continuous strip of adhesive tape, mechanism forsevering the tape between said piles which comprises a spring-actuated, rotatable cutting blade, means for continuing rotation of said blade to initial operative position after each cutting operation,

and means actuated by each advancing pile of sheets in turn to check said blade in such position under action of its spring when a pile of sheets is in the path of movement path of movement of said blade for checking said blade against movement under action ofits spring, said blade being mounted for yielding lateral displacement in the direction of the advancing piles.

5. In a machine for advancing in continuous procession individual piles of assembled sheets having. applied tojan edge of each thereof a continuous strip of adhesive tape, mechanism for severing the tape between said piles which comprises a spring-actuated cutting blade, normally inoperative means for checking said blade againstmovement under action of its spring, and means for rendering said checking means operative when a pile of sheets in transit is in the path of movement of said blade, said blade being mounted for yielding lateral displacement in the direction of the advancing piles.-

6. In a machine for advancing in continuous procession individual piles of assembled sheets having applied to an edge of each thereof [a continuous strip of adhesive tape, mechanism forsevering the tape between said piles which comprises a springactuated cutting blade, means for returning said blade to initial operative position after each cutting operation, and means actuated by each advancing pile of sheets in turn to l c e ck said blade in such position under action of its spring when a pile of sheets is in the path of movement thereof, said blade being mounted for yielding lateral displacement in the direction of the advancing piles,

7. In a machine for advancing in continuous procession individual piles of assembled sheets having applied to an edge of each thereof a continuous strip of adhesive tape, mechanism for severing the tape betweensaid piles which comprises a rotary spring-aotw ated cutting tive b the interposition of a pile of assembled sheets therein and in'the path of movement of said blade for checking said blade against movement under action of its spring, and means forenergizing said spring while said bladeis held in its checked condition,

said blade being mounted for yielding lateral displacement in the direction of the advancing piles.

blade, means rendered opera-.

8. In a machine for advancing in continuous procession individual piles of-assembled sheets having applied to an edge of each thereof a continuous strip of adhesive tape, mechanism'for severing the tape be' tween said piles which comprises a driven shaft, a rotating element loose upon said shaft and carrying a cutting blade adapter. upon revolution thereof intersect the path 0 movement of said tape, a frictionally driven rotating element on said shaft, a spring interposed between said elements, and means rendered operativeb the interposition of a pileof assembled s eets there-- in and in the path of-movement of said blade for checking movement of said loose element and thereby storing energy in said spring under continued rotation -of .said' frictionally driven element.

9.- In a machinefor advancing in con-I tinuousp-rocession individual piles ofassembled sheets having applied to an edge of each thereof a continuous strip of adhesive tape, mechanism for severing the tape between said piles which comprises a driven shaft, a rotating element loose upon said shaft and carrying a cutting blade adapted upon revolution thereof. to intersect the path of movement of said tape, said blade being mounted for yielding lateral displacement in the direction of the advancing piles,

a frictionally driven rotatingelement on said. shaft, a spring interposed between said elements, and means rendered operative by th interposition of a pile of assembled sheets therein and in the path of movement of said blade for. checking movement of said loose element and thereby storing energy in said spring under continued rota tion of saidfrictionally, driven element.

10. In a machine for advancing in continuous procession individual piles of assem- :bled sheets having applied to an edge of each thereof a continuous strip-of adhesive tape, mechanism for severing the tape between said piles which comprisesa driven shaft, a rotatingelement loose upon said shaft and carrying a cutting blade adapted upon revolution thereof to intersect the path of movement of said tape, a frictionally driven rotating element on said shaft, a spring interposed between said elements, normally inoperative means, rendered operative by the interposition of a pile of assembled sheets therein and in the path of move- -mentof said blade, for'checking movement of said loose element and thereby storing energy in said spring under continued rotation of said frictionally driven element, and means for positively limiting the extent of relative rotation of said elements.

11. In a machine for advancing in continuous procession individual piles of assembled sheets having applied to an edge of each thereof a continuous strip of adhesive 119 0 tape, mechanism for severing the'tape between said piles which comprises, a driven shaft, a rotating element loose upon said shaft and carrying a cutting blade adapted u on revolution thereof to intersect the path oi movement of said tape, said blade being mounted for yieldin lateral displacement in the direction of t e advancing piles, a frictionally driven rotating element on said shaft, a spring interposed between said elements, normally inoperative means, rendered operative by the interposition of a pile of assembled sheets therein and in the ath of movement of said blade, for checkmg movement of said loose. element and thereby storing energy in said spring under continued rotation of said frictionally driven element, and means for positively limiting the extent of relative rotation of said elements.

. In testimony whereof I aflix my signature in presence of two witnesses.

JOSEPH HREN. Witnesses:

LOUIS KEGLER, LOUIS Known, Jr. 

